Malicious PDF — malware analysis report

Static analysis result for SHA-256 db9fe6922d5d429f…

MALICIOUS

PDF

83.7 KB Created: 2021-07-14 00:46:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d5fa6eea9f1ceb76b0f4a721234eb854 SHA-1: 232a8d6aa162564a258f6f791a514bd3e662ad57 SHA-256: db9fe6922d5d429f3286a1550bdb592ef939ede10352896a716f159e0876992b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to numerous external URLs, some of which are hosted on compromised WordPress sites. The embedded URLs and the nature of the link farm suggest an attempt to lure users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://irlanc.ru/uplcv?utm_term=pill+in+english PDF link annotation
    • http://sirmamedia.com/ckfinder/userfiles/files/90443739380.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/folalaverusom.pdfIn PDF document text
    • http://bonapartefamilynetwork.com/clients/7/7d/7d081654635712149502d88e72c54c2d/File/vokilesawa.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5a0128d755---31042065657.pdfIn PDF document text
    • http://nowator-zpu.pl/userfiles/file/22603701292.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/7429844603.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/wirujaxekofanegifowumul.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b04a721bb81---rosanikivukitetijavexide.pdfIn PDF document text
    • http://fernandopelosini.it/userfiles/files/larunowanumu.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608389bfeb64c---pofetuluvofop.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a127eba91c8---27964199385.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/jisadajifiraxefixema.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f25372da15---429703180.pdfIn PDF document text
    • http://planetamama.ru/files/file/pubodawekaxo.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/ea9adul91ndu091pv1pucsv7b2/4591029974.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071da8a006aa---mikidufifexitulozokupo.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072ab7f614ce---11000224023.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077323ce39f3---39990959751.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/d4bcd144b45b4ac11c6f63a47b6842d7/xejifewitawe.pdfIn PDF document text
    • http://didocrosby.com/imagenes/file/60918486387.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c01555d0aa---bagezojuwilozigowemu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA0 16140 bytes
SHA-256: 00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b
font_01_sfnt_off0000e418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE418 18384 bytes
SHA-256: e2cfc7a1c66aee9a9d5efe7a9b88d88c1fac4c1eb2d34d7011b9491ea8040fc7
font_02_sfnt_off000113c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C4 9908 bytes
SHA-256: e992410a39ec84fa539bab0d9a6c7f3e59f16fa45f5ab1cc6e4f233cf90e8470
font_03_sfnt_off00012973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12973 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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